Electric switch



March 26, 1929. A. D. MOGIBBON 2 Sheets-Sheet l INVENTOR, .MCG 1212022,

Albert .0

ELECTRIC SWITCH Filed March 23, 1928 March 26, 1929,

A. D. M GIBBON ELECTRIC SWITCH Filed March 23, 1928 2 Sheets-Sheet 2 MIMI!" n1 llllIlIIIlll [mm Tun INVENTOR, Am err p. Me a;

Patented Mari 26, 1929.

UNITED. STATES 1 1,706,627 PATENT OFFICE.

ALBERT MCGIBE BO N, OF PLAINVILLE, CONNECTICUT, ASSIGNOR TO THE TBUMBULL ELECTRIC MANUFACTURING COMPANY, OF PLAINVILLE, CONNECTICUT, A COB- closed switches' One object of my invention is to provide a fused type of switch with accessible fuse sockets and in which the switch contacts and movable switch member are readily accessible for inspection. 7

One object is to produce at acompartively low cost a compact double break switch of such a simple and rugged construction that it cannot under ordinary circumstances become disabled or fail to operate.

Another object is. to provide a double break switch of the foregoing character in which the circuit is opened or closed at both contacts simultaneously.

Another object is to provide a double break switch requiring a minimum number of parts and avoidin the use-of jointed contacts.

In its preferred form the switch comprises an insulating body which is supported within a box but spaced apart from the bottom of a the box. The fuse sockets are accessible from L the'front of the body and theswitch contacts inspection purposes. Y

insulating material andis supported by a are; mounted in the outer face of the body. The switch operating crank is supported in the box and passes beneath the insulating body whereit is connected to an insulating connector or plunger which extends outward: 1y through the insulating body and carries the movable switchimember where it is visible for Fig.1 is a perspective view of the box with the switch mechanismmounted therein, but with the cover'omitted. Fig, 2 is. a transverse sectional viewhof the box and showing the switch proper in position, together with the shield or cover member which normally prevents access to the line connections and switch contacts.

'Fig. 3 is a front view of the switch proper. Fig. ,4 is a vertical sectional view on the plane of the line 4-4.of Fig. 3.

a Fig. 5 is a fragmentary front view of the insulating body. I Fig. 6 is a perspective view of the mov able switch member. v The body 10 may be formed of any suitable bracket 11in the box, or receptacle 12. The operating crank 13 is pivotedin the opposite P sides of the box and is provided with an" external operating handle or'lever 14.

The insulating body is'formed with a pedengages.

swrrcn.

1928. Serial no. 264,259.

estal 15 in which are mounted fuse sockets 16 and 17 of. the usual character.

The circuit terminal 18 .is connected to the center contacts of the-fuse sockets and the circuit ,terminals 19 and '20 are connected in the usual manner with the screw shells of the fuse sockets. I I

The bus bar or conducting terminal strip 21 may be positioned at one side of the base to facilitate the wiring connections. I

The line v terminal 22 is connected to the opposite side of the base at the lower edge. The other line terminal 23 is mounted at the upper edge of the base. The switch contacts orjaws 24 and 25 are secured to the base, for instance, by screws 26 and 27.

The fuse socket shell 28, which is in electrical contact with the terminal 23 is secured to the base by the center contact screw 29, which is insulated from the'screw shell in the usual manner. This screw 29 is seated at its lower end in one arm of the bracket 30 and the other arm of the bracket 30 constitutes the seat for the screw 27. The insulating'flange 31, adjacent to the contact 25, serves as the support for the shell 28 and attached parts.

The movable switch member or blade 32 is suitably secured to a plunger or connector 33 which 'is preferably formed of insulating material. T This connector may conveniently be formed in any suitable manner, for instance, in two parts riveted to opposite sides of the blade 32, as shown in Fig. 6. Obvious- 1y, it may be formed in one ,piece if so deslred.

The insulating base 'is provided with a guidepassage 34 for the connector 33 and also guide flanges 35 and 36 which assist in positioning the connector 33. Webs 36, may

be extended between the member 33 and the contacts 25 and 32 to s; a The rear end of the connector may be proprevent or restrict arcvi'ded with a pin 37 or other device serving as a stop to limit theoutward movement of the connector and switch blade. The rear end of the connector is provided with a slot 38, in which the crank 39 of the shaft '13 It will be seen that Fig. 1 shows the switch parts in the closed circuit position. I When which movement rotates the shaft 13 so that its crank portion 39 thrusts the connector 3?) and the switch blade 32 outwardly and away from the contacts 2% and 25, thus opening the circuit from both contacts simultaneously.

In this type of switch the conducting parts and the main line fuse or fuses are usually covered and locked so as to, prevent access by unauthorized persons. In this case an ordinary switch box cover 40 serves this purpose and, in this form, it is provided with an opening which registers with the boss or projecting portion 41 of the fuse socket. pedestal thus permitting the current consumer to manipulate the fuses on the load side of the circuit without opening the box.

It will, of course, be understood that further means for covering the current consunr ers fuses may be provided as is common in constructions of this character, but since constructions of this character are not pertinent to my present invention, I have not shown them in my drawings.

I claim:

1. In a switch, an insulating body, having a guide passage and an insulating flange, a

contact secured to said body between said passage and one side of said flange, a fuse socket secured to the opposite side of said flange, a contact secured to said body beside the passage opposite said first mentioned contact,

a connector guided insaid passage and a switch member actuated by said connector. 2. An enclosed switch comprising a box, an insulating body supported therein, but spaced apart from the bottom thereof, fuse sockets mounted in said body and opening toward the front, circuit terminals carried by said body,-contacts supported at the front of said body and connected to said terminals, a switch member adapted to connect said contacts, a connector extending through said body for actuating said switch member, an operating crank supported by said box and extending behind said body and connected with said connector and a cover plate extending over said switch member and having an opening for access to said fuse sockets.-

3. A double-break switch including an insulating body having fuse sockets and having a guide passage alongside the fuse sockets, a stationary contact secured to the body above and below said passage, an insulating connector guided in said passage, a switch blade secured to the outer end of said connector and coacting with said contacts in front of said body, and an operating crank connected to the inner end of the connector behind said body.

4. An electric switch including an insulating body having a guide passage and an insulating flange above the same. a contact secured to said body between said passage and one side of said flange, a fuse socket secured to the opposite side ofsaid flange, a contact and circuit terminal secured to said body opposite said first mentioned contact, a connector guided in said passage and a switch blade carried by said connector and coacting with said contacts.

5. An enclosed switch including a box, an insulating body supported therein but spaced apart from the bottom thereof, circuit terminals carried by said body, contacts supported at the front of said body and connected to said terminals and spaced apart from each other, a switch blade adapted to connect said contacts, a connector extending through said body between said contacts and connected to said switch blade and an operating crank extending behind said body and connected with said connector.

6. In a switch, an insulating body, having a guide passage. a stationary contact secured to said body adjacent one side of said passage, a cooperating stationary contact secured to said body adjacent the opposite side of said passage, a connector guided in said passage, a movable switch member carried by said connector and a crank for operating said connector.

7. An enclosed switch including a box, an insulating body supported therein and having a guide passage therethrough, fusesockets mounted on said body, circuit terminals mounted on said body, stationary switch contacts mounted on said body and connected to said terminals, a movable switch member adapted to connect said contacts. a connector extending through said body and through said guide passage for actuating said switch member, an operating crank supported by said box and having operable connection with said connector and a cover extending over said switch member and having an opening for access to saidfuse sockets.

S. A double-break switch including an insulating body having a guide passage therethrough, stationary contacts secured to the body at. opposite sides of said passage. an insulating connector guided in said passage, :1 switch blade carried by said connector and coacting with said stationary contacts, and a crank member having operable connection with said connector.

9. An electric switch including an insulating body having a guide passage, two sta tionary contacts secured to said body at opposite sides of said passage, an insulating connector guided in said passage, a movable. switch blade carried-by said connector and coacting with said stationary contacts and crank meansfor moving said connector to operate the said switch.

10. An enclosed switch including a box, an insulating body supported therein but spaced apart from the bottom thereof. circuit. terminals carried by said body. stationary switch contacts supported at the front of lit) ating crank extending behind said body andoperably connected with said insulating connector.

11. An electric switch including an insulating body having a gulde passage, stationary contacts securedto the said body at opposite sides of said passage, an insulating connector guided in said passage, a switch blade carried by said connector for bridging said contacts and a crank member having an operable connection with said connector.

ALBERT D. MCGIBBON.

I DISCLAIMER 1,706,627.-Albert D. McG'ibbon; Plainville, Conn. ELECTRIC ,S-WITCH. Patent dated March 26, 1929. Disclaimer filed March 19, Trumbull Electr'iaManufacturing O0.

1930, by the assignee, The

Hereby enters this'disclaimer as to the subject matter'of claims 6 and 7 of said patent except as the said claims are construed to cover a construction in which the stationary contacts and the Inovable switch member are located on the front of the insulatlng bodyand the crank is mounted at the rear of the body with aconnector passing through the body from the front to the rear.

[Qfltcial Gazette April 8 1930.] 

